<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="./style/base.css">
    <style>
        body{
            background-color: #080325;
        }
        .w{
            margin: 0 auto;
            width: 1200px;
        }
        .top{
            height: 64px;
            width: 100%;
            transition: all .3s;
        }
        .top:hover{
            background-color: rgba(255,255,255,0.2);
        }
        .top .logo{
            float: left;
            height: 64px;
        }
        .top .logo img{
            height: 100%;
        }
        .top ul{
            float: right;
        }
        .top ul li{
            float: left;
        }
        .top ul li a{
            position: relative;
            display: block;
            float: left;
            height: 64px;
            line-height: 64px;
            font-size: 14px;
            margin-left: 30px;
            color: #fff;
        }
        .top ul li a::after{
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            height: 2px;
            width: 100%;
            background-color: #fff;
            transition: all .3s;
            transform-origin: center;
            transform: scale(0);
        }
        .top ul li:hover a::after{
            transform: scale(1);
        }
    </style>
</head>
<body>
    <div class="top">
        <div class="w">
            <div class="logo"><img src="./img/xl.png" alt=""></div>
            <ul>
                <li><a href="#">首页</a></li>
                <li><a href="#">产品中心</a></li>
                <li><a href="#">区块链</a></li>
                <li><a href="#">广告服务</a></li>
                <li><a href="#">开放能力</a></li>
                <li><a href="#">关于我们</a></li>
                <li><a href="#">投资者关系</a></li>
            </ul>
        </div>
        </div>
    </div>
</body>
</html>